-20.65% is the change from 615 to 488
Calculation steps:
[( 488 - 615 ) ÷ 615] x 100 = -20.65%
Formula
Percentage change = [(488 - 615) / 615] x 100
Subtract the new number by the original number
488 - 615 = -127
-127 ÷ 615 = -0.20650406504065041
-0.20650406504065041 x 100 = -20.65%